THG 2019 Proxy Statement

THE HANOVER INSURANCE GROUP 2019 PROXY STATEMENT 5 Largest Owners of the Company’s Stock The following table lists the only persons who, to the best of the Company’s knowledge, are “beneficial owners” (as defined by SEC regulations) of more than five percent of the issued and outstanding shares of Common Stock as of March 15, 2019. Name and Address of Beneficial Owner Shares Beneficially Owned Percent of Class The Vanguard Group, Inc. 4,315,090(1) 10.61% 100 Vanguard Blvd. Malvern, PA 19355 BlackRock, Inc. 3,831,310(2) 9.42% 55 East 52 nd Street New York, NY 10055 (1) Based on a Schedule 13G/A filed on February 11, 2019 by The Vanguard Group, Inc. that reported sole voting power with respect to 20,043 shares, sole dispositive power with respect to 4,293,644 shares, shared voting power with respect to 5,299 shares and shared dispositive power with respect to 21,446 shares. The Schedule 13G/A filed by The Vanguard Group, Inc. also reported that Vanguard Fiduciary Trust Company, a wholly owned subsidiary of The Vanguard Group, Inc., is the beneficial owner of 16,147 shares and Vanguard Investments Australia, Ltd., a wholly owned subsidiary of The Vanguard Group, Inc., is the beneficial owner of 9,195 shares. (2) Based on a Schedule 13G/A filed on February 4, 2019 by BlackRock, Inc. that reported sole voting power with respect to 3,657,726 shares and sole dispositive power with respect to 3,831,310 shares.